Saw-blade.



No. 833,528. PATEN-TED 0cT.16,1906.' A. F. JONES.

SAW BLADE. APPLICATION FILED JULY 17. 1905.

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consists of a thinflat p UNITED STATES PATENT OFFICE.

Specification of llfietters Patent.

Patented 0a; 16, 1906.

application 5186 m 17, 1905'. Serial No. 269,966.

T0 all whom. it 'may'concern:

setts, have invented an Improvement in Saw- Blades, of which thefollowing description, in connection with the accompanying drawings, isa specification, like characters on the drawings representing likeparts.

This invention .relates to saw-blades for sawing'stone, andhas for itsobject to pro-' videja blade which may be made of soft metaL'andconsequently flexible, with teeth minate flush withthe ends of theteeth, the employment of said wearing ortions result- 7 ing inreducingthe wear on t e teethfto the minimum and enabling the productionof a flexible blade with very durable teeth.

Figure 1 shows in side elevation a portion of a saw-blade embodying thisinvention. Fig. 2 is a vertical section of the same,taken on the dottedline 2 2. Fig. 3 is a vertical section of the same, taken on the dottedline 3 3. Fig. 4 is an edge view of-one of the hard metal plates to bereferred'to.

0 represents the'bodp ofthe blade, which ate orbar'of soft iron orequivalent material of an suitable dimensions and having a straightower; edge. The lower edge of the bar a is cut transversely at re ularintervals to form semicircular or other shaped recesses a, and therebyprovide the bar with a row of projecting te'ethfthe ends of which arestrai ht and serve as stoneengaging' faces. The ar thus made'of softiron or equivalent material for flexibilitv will wearaway rapidly, andto'obviate this hardmetal plates 6 are secured to the bar at'the'recessed portions thereof, which are constructed and arranged, as willbe described, to provide wearing portions at both endsof thestone-engaging faces of the teeth. The

plates b are made rectangular in shape and considerably thicker than thebar, and the edges of the plates, at the to s and both ends, aregrooved, as at b. T e width of the marginal grooves b in the platescorresponds to the thickness of the bar a, so as to receive said bar,and the bottoms of said grooves correspond to the shape of the recessesin the bar, so that the plates may be placed upon or' slid onto the barat the recessed portions thereof and abutted firml Be it known that I,ALBER r JONES, of Salem county of Essex,State of Massa'chw spacesbetween the teeth on the bar.

against its lower of the teeth. The lower. edges of the plates 1) arevcut transversely to provide semicircular or,' other shaped recesses 72*,which form The plates are secured tothe bar by rivets c or othersuitable fastenings. The hard-metal plates 12 thus inclose or cover theedges of the teeth on the bar, and as the lower ends of said platesterminate flush with the ends of the teeth hard wearing portions areprovided at both ends of the stone-engaging faces of the teeth, whichwill be continued as the. teeth thus protected slowly wear awa The iwear on the teeth is thus reduced to t e minimum.

In practice the water and sand used in =sawing stone pass freely alongthe sides of the bar a, and as the bar is moved to and fro the same willrepeatedly-accumulate in and be.

reinove'd from the interdental spaces 6 Having thus described myinvention, what I claim as new, anddesire' to secure by Let-.

ters Patent, isv 1. A saw-blade for sawing stone consistin ofa-bar'recessed along its lower edge to provide teeth, plates secured to saidbar, at-the recessed portions thereof, the lower edges of which areterminated flush with the ends of the teeth on the bar to providewearing portions at both ends of the stone-engaging faces ofthe teeth,and are formed with transverse recesses at points intermediate theirlength to provide interdental spaces, substantially as. cscribed. 2. Asaw-blade for sawing stone consisting -of.a barrecessed along its loweredge to form teeth, plates secured to said bar, at the recessed portionsthereof, which are made" thicker than the bar, and have their loweredges terminated flush with the ends of the teeth'on' the bar, toprovide wearing -portions at both-ends of the stone-engaging faces ofthe teeth, formed with transverse recesses'at points intermediate theirlength to provide interdental spaces, and have their tops and both endsgrooved to receive the bar, substantially as described. i

3. A saw-blade for sawin stone, consisting'of asoft-meta'l bar rovi edalon its edge with projecting'teeth avingstraig t stone- 5 5 edge, andwhen thus place in position on the engaging 'faces or ends, andhard-metal plates inclosing the edges of said teeth, at both ends oftheir stone-engaging faces, which terminate flush with said stone-enaging faces, and serve as wearing portions or the teeth, said plateshaving interdental recesses, substantially as described.-

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CYNTHIA DOYLE.

